Non-Fermi liquid-like behavior around the critical concentration in CeCoGe3-xSix (x similar or equal to 1.2)

Kondo effect and quantum critical behavior in the pseudoternary system of C eCoGe3-xSix (x similar or equal to 1.2) have been studied down to about 0.1 K. The antiferromagnetism is suppressed near x = 1.2 by the enhanced Kondo effect and an intermediate-valence regime with a very high Kondo temperatu re of the order of 900 K is followed further on in the silicon-rich region. Non-Fermi liquid-like behavior around the critical concentration, the In T -dependence of CIT in the intermediate temperature ranges and the T-linear electrical resistivity have been investigated in some detail. (C) 2000 Else vier Science B.V. All rights reserved.